Finding the Fourth Proportional to 8,700.99, 12,002.01 and 7,689.47

Step by Step Solution

1. Step 1: Write the proportion equation
   8,700.99 : 12,002.01 = 7,689.47 : x
2. Step 2: Convert to fraction form
   8,700.99/12,002.01 = 7,689.47/x
3. Step 3: Cross multiply
   8,700.99x = 12,002.01 × 7,689.47
4. Step 4: Simplify right side
   8,700.99x = 92,289,035.82
5. Step 5: Solve for x
   x = 92,289,035.82/8,700.99
6. Step 6: Final answer
   x = 10,606.73